Ondrej Štepánek (Czech pronunciation: ['ondr??j '?c?pa?n?k]) (born 28 November 1979 in Brandýs nad Labem) is a Czech slalom canoeist who competed at the international level from 1994 to 2013.
Competing in four Summer Olympics, he won two medals in the C2 event with a silver in 2008 and a bronze in 2004.
Štepánek also won nine medals at the ICF Canoe Slalom World Championships with six golds (C2: 2006; C2 team: 1999, 2003, 2006, 2007, 2013) and three silvers (C2: 2003, 2013; C2 team: 2010).He is the overall World Cup champion in C2 from 2005.
He also won a total of 13 medals at the European Championships (6 golds, 5 silvers and 2 bronzes).His partner in the C2 boat throughout the whole of his career was Jaroslav Volf.